Who Made DeltaMath? The Complete Story Behind the Platform

Who Made DeltaMath? Meet the Creator

DeltaMath was created by Zach Korzyk, a dedicated high school math teacher from Brooklyn, New York. Korzyk founded DeltaMath in 2009 while teaching at a public high school, driven by his desire to give students better tools for practicing mathematics.

Unlike many educational technology platforms created by Silicon Valley startups or large corporations, DeltaMath was born in the classroom by someone who intimately understood the daily challenges of math education. Zach Korzyk wasn't a tech entrepreneur looking for a market opportunity — he was a working teacher who saw a problem and decided to solve it himself.

Korzyk understood firsthand the challenges students face when learning math: limited practice opportunities, delayed feedback on homework, and the frustration of not knowing where they went wrong until days after submitting an assignment. He also understood the challenges teachers face: spending countless hours grading homework, trying to identify which students needed extra help, and attempting to differentiate instruction for students at different levels.

What makes Korzyk's story remarkable is that he built DeltaMath while still working as a full-time teacher. He wasn't backed by venture capital or supported by a development team. He saw the gap between what textbooks offered and what students actually needed, and he decided to fill it himself using his own programming skills and deep understanding of mathematics pedagogy.

Why Was DeltaMath Created?

To understand why Zach Korzyk created DeltaMath, you need to understand the state of math education in the late 2000s. Teachers relied heavily on textbooks that provided a limited number of practice problems. Once students completed those problems, there was no easy way to generate more. If a student needed additional practice on a particular concept, teachers had to manually create worksheets or search for supplementary materials.

The feedback loop was equally problematic. Students would complete homework assignments, turn them in the next day, and then wait — sometimes for days — before receiving graded work back. By the time they learned they had made mistakes, the class had already moved on to new material. This delayed feedback made it difficult for students to correct misconceptions and build a solid foundation.

Korzyk recognized that technology could solve all of these problems. A computer could generate unlimited practice problems, provide instant feedback, track student progress, and give teachers data about class performance. The question was whether such a tool existed — and in 2009, it didn't. At least, not in the form that Korzyk envisioned.

So he built it himself. Starting with the topics he taught most frequently, Korzyk began creating a database of math problems that could be generated algorithmically. Each problem type had variations, so students would see similar problems but never the exact same one twice. The system would check answers instantly and provide feedback, allowing students to learn from their mistakes immediately rather than days later.

The Early Development of DeltaMath

The first version of DeltaMath was far simpler than the platform students use today. Korzyk started by creating problems for the topics he was teaching at the time — primarily algebra and geometry. He tested the system with his own students, gathering feedback and making improvements based on what worked and what didn't.

This real-world testing proved invaluable. Unlike software developers who might build an educational tool based on assumptions about what teachers and students need, Korzyk was using his creation daily in his own classroom. He could see immediately when a problem was confusing, when the interface was clunky, or when students needed additional scaffolding to succeed.

Word began to spread among Korzyk's colleagues. Other math teachers at his school started using DeltaMath with their own classes. They provided feedback, requested new features, and asked for problems covering topics Korzyk hadn't yet built. Gradually, the platform expanded to cover more and more of the standard mathematics curriculum.

One of the key decisions Korzyk made early on was to keep DeltaMath free for teachers and students. This wasn't a business venture designed to generate profits — it was a tool built by a teacher to help other teachers and their students. This philosophy helped DeltaMath spread rapidly through the education community, as there were no budget approvals or purchasing decisions required to start using it.

How DeltaMath Grew Into a Major Platform

What started as a classroom tool quickly spread through word of mouth among teachers. DeltaMath's growth was organic — teachers shared it with colleagues at conferences, in online forums, and during professional development sessions. Schools began adopting it department-wide, then district-wide.

The platform's reputation for quality and reliability helped drive adoption. Unlike many educational technology tools that promise more than they deliver, DeltaMath actually worked. The problems were mathematically sound, the interface was intuitive, and the instant feedback genuinely helped students learn. Teachers who tried it kept using it, and they recommended it to others.

By the mid-2010s, DeltaMath had expanded far beyond its original scope. The platform now covered the entire K-12 mathematics curriculum, from basic arithmetic through advanced calculus and statistics. Thousands of problem types had been developed, each with multiple variations to ensure students received ample practice.

The COVID-19 Pandemic: A Turning Point

The COVID-19 pandemic in 2020 accelerated DeltaMath's adoption dramatically. As schools shifted to remote learning almost overnight, teachers desperately needed digital tools that could work in an online environment. Many traditional teaching methods simply didn't translate to video calls and asynchronous learning.

DeltaMath was perfectly positioned for this moment. It was already online, already free, and already familiar to many teachers. For those who hadn't used it before, the learning curve was minimal. Within weeks of schools closing, DeltaMath usage exploded as teachers across the country adopted it for remote instruction.

The platform proved invaluable during this period. Students could practice at their own pace, receive immediate feedback even when their teacher wasn't available, and track their own progress. Teachers could assign work, monitor completion, and identify struggling students without face-to-face interaction.

DeltaMath Today: A Comprehensive Platform

Today, DeltaMath is used by millions of students across the United States and internationally. The platform has grown from a simple homework tool into a comprehensive mathematics practice system with features that Korzyk probably never imagined when he started building it in 2009.

The current version of DeltaMath includes thousands of different problem types covering every major mathematics topic from middle school through advanced placement courses. Each problem type has been carefully designed to help students build understanding, with progressive difficulty levels and detailed explanations for incorrect answers.

Subjects Covered by DeltaMath

DeltaMath now covers an extensive range of mathematics topics, making it useful for students from middle school through college:

DeltaMath Plus and the Business Model

While DeltaMath remains free for basic use, Korzyk eventually introduced DeltaMath Plus, a premium tier that offers additional features for teachers who want more advanced functionality. This represents a shift in the platform's business model, though the core experience remains accessible to all.

DeltaMath Plus includes features like test mode (which prevents students from seeing solutions until after the assignment is complete), more detailed analytics, and additional customization options. Schools and districts can purchase licenses for their teachers, providing a sustainable revenue stream to support the platform's continued development.

This freemium model has allowed DeltaMath to grow without compromising its original mission of accessibility. Students and teachers who can't afford premium features still have access to thousands of practice problems with instant feedback — the core functionality that made DeltaMath valuable in the first place.

DeltaMath's Impact on Mathematics Education

The person who made DeltaMath, Zach Korzyk, probably didn't anticipate the profound impact his creation would have on mathematics education across the country. DeltaMath has changed how millions of students learn math and how thousands of teachers approach homework and practice.

For students, DeltaMath has made it possible to practice math on their own terms. They can work through problems at their own pace, get immediate feedback, and see solutions when they're stuck. This has been particularly valuable for students who learn differently or who need more practice than their peers.

For teachers, DeltaMath has freed up hours that would otherwise be spent grading homework. Those hours can now be devoted to lesson planning, individual tutoring, or developing engaging classroom activities. Teachers also have access to data about student performance that was simply unavailable before, allowing them to identify struggling students early and intervene before they fall behind.

The Challenges Students Face with DeltaMath Today

While DeltaMath has revolutionized math practice in many positive ways, it's also created new challenges for students. The platform's extensive use in schools means students are spending more time than ever on math homework, often struggling with complex problems late into the night.

One of the key features that makes DeltaMath valuable for learning — the fact that students must demonstrate mastery before moving on — can also make it frustrating when students get stuck. Many students find themselves trapped on difficult problems, unable to complete their assignment before the deadline.

DeltaMath's design philosophy assumes that students will eventually figure out the right answer if they keep trying. While this builds persistence, it doesn't account for the reality that students have multiple classes, extracurricular activities, and limited time. A student who's stuck on a calculus problem at midnight doesn't have time to keep guessing — they need to finish the assignment and get to sleep.

These challenges have led many students to search for additional help with their DeltaMath assignments. While DeltaMath shows solutions after you've used all your attempts, this doesn't always help when you're trying to complete an assignment before a deadline or when you don't understand the underlying concept well enough to apply the solution to similar problems.

Why SkipDelta Is the Best Solution for DeltaMath Students

Understanding who made DeltaMath and why it was created helps you appreciate the platform's strengths. But when you're stuck on a problem at midnight with an assignment due the next morning, you need practical solutions. That's exactly why SkipDelta was created — to help students succeed on DeltaMath when they need help the most.

SkipDelta is the most effective tool for getting DeltaMath answers instantly. Unlike searching for solutions online, trying inspect element tricks that don't work, or hoping a friend can help, SkipDelta provides reliable, accurate answers for any DeltaMath problem in seconds.

How SkipDelta Works

SkipDelta is a Chrome extension that works directly with DeltaMath's interface. When you're working on an assignment and encounter a difficult problem, you simply click the SkipDelta extension to get the answer instantly. There's no searching, no copying and pasting, no waiting — just immediate solutions.

Why SkipDelta Is Better Than Other Solutions

Students have tried many approaches to getting help with DeltaMath, but none work as reliably as SkipDelta. Here's how SkipDelta compares to alternatives:

What Makes SkipDelta the Best Choice

What Students Say About SkipDelta

Conclusion: From Classroom Tool to Essential Platform

The story of who made DeltaMath is a remarkable example of a teacher solving a problem he encountered daily in his own classroom. Zach Korzyk didn't set out to build a platform used by millions of students — he just wanted to help his students practice math more effectively.

That humble beginning in a Brooklyn high school classroom has grown into one of the most widely used mathematics education platforms in the country. DeltaMath has changed how teachers assign homework, how students practice skills, and how schools approach math instruction.

But with great adoption comes new challenges. The very features that make DeltaMath effective for learning — the requirement for mastery, the unlimited problems, the persistent deadlines — can also make it overwhelming for students juggling multiple classes and responsibilities.

That's why SkipDelta exists. When you're stuck on a difficult problem, facing a midnight deadline, or just need to finish your homework so you can get some sleep, SkipDelta is there to help. It's the most reliable, easiest-to-use solution for getting DeltaMath answers instantly.